# Jonasz Staszek

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## Activity overview

Latest activity by Jonasz Staszek
• Jonasz Staszek commented,

Hi Tanvir, maybe changing MIPFocus to 1 could help? Best regardsJonasz

• Jonasz Staszek commented,

Hi Tanvir, recently Matthias wrote a great note about the MIP Gap. It should be able to clarify most of your questions. Best regardsJonasz

• Jonasz Staszek commented,

Hi Hussein, the bound could be due to the presolve - Gurobi might have implied it from the other constraints in your model. I recommend that you specify a name for each of your constraints (as desc...

• Jonasz Staszek commented,

This question has been asked (and answered) here and here. I would recommend you state a more detailed question. You will find an excellent guide here. Otherwise, it is going to be very difficult t...

• Jonasz Staszek commented,

• Jonasz Staszek commented,

Dear Ghada, what kind of "thing" are you experiencing? Are the results not what you expected them to be? It would be helpful to also describe what kind of model you are solving and what is the desi...

• Jonasz Staszek commented,

Dear Johan, I am unable to replicate your issue. I compared the logs and the solutions generated by Gurobi 9.5.2 and 10 and both the presolve statistics and solutions seem identical. Perhaps you co...

• Jonasz Staszek commented,

Dear Yutong, could you please share a minimal reproducible example of the code which throws the error you mention? Best regardsJonasz

• Jonasz Staszek commented,

Dear Simon, the reason for the lower bound being set to $$x^L > 0$$ in the case you mention is to avoid  $$x$$ assuming the value of $$0$$. If you also need to include the case of negative va...